¬, <, ≤, =, ≥, >, < , ≤ , ≥ , > , +, −,· where > 0, = 0,1 includes the Boolean algebra (,∧,∨, ¬) and integer modular ring (ℤ/2). … so what? Mixed Boolean-Arithmetic Algebraic System [] Mixed Boolean-Arithmetic Expressions x + y 2 * (x | y) – (x ^ y) (x | y ) + (x & y) (x ^ y ) + 2 * (x & y) … v0 = x*0xe5 + 0xF7 v0 = v0&0xFF v3 = (((((v0*0x26)+0x55)&0xFE)+(v0*0xED)+0xD6)&0xFF ) v4 = ((((((- (v3*0x2))+0xFF)&0xFE)+v3)*0x03)+0x4D) v5 = (((((v4*0x56)+0x24)&0x46)*0x4B)+(v4*0xE7)+0x76) v7 = ((((v5*0x3A)+0xAF)&0xF4)+(v5*0x63)+0x2E) v6 = (v7&0x94) v8 = ((((v6+v6+(- (v7&0xFF)))*0x67)+0xD)) res = ((v8*0x2D)+(((v8*0xAE)|0x22)*0xE5)+0xC2)&0xFF return (0xed*(res-0xF7))&0xff (x & 0xFF) ^ 0x5c Zhou et al. Information Hiding in Software with Mixed Boolean-Arithmetic Transforms. WISA, 2007. https://dl.acm.org/citation.cfm?id=1784971